Hydraulic air-pump



(N0 Modei.)

E. H. WEATHERHEAD.

HYDRAULIG'AIR PUMPJ Patent-ed June 16, 1896.

W n. Q

ANDREW RGRAMAM. PMOTDUNQWASMINETON D C UNITED STATES PATENT 'OFFICE.

EDXVARD H. EATHER-HEAD, OF CLEVELAND, OHIO.

HYDRAULIC AlR-PUM P.

SPECIFICATION forming part of Letters Patent No. 562,163, dated June 16,1896.

Application filed October 20, 1894. Serial No. 526,434. (No model.)

To aZZ whom/ it may concern: 1

Be it known that I, EDWARD H. WEATHER- HEAD, a citizen of the UnitedStates, residing at Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain new and useful Improvements in HydraulicAir- Pumps; and I do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilledin the art to which it appertains to make and use the same.

My invention has reference to hydraulic air-pumps, and the inventionrelates more especially to the variety of pump in which hydraulicpressure is used to pump or compress air and in which the operations areantomatic, all substantially as shown and described, and particularlypointed out in the claims.

I11 the accompanying drawings, Figure 1 is a vertical central sectionalelevation of a pump constructed according to my invention. Fig. 2 isacross-section thereof on line 2 2, Fig. 1. Fig. 3 is a cross-section online 3 3, Fig. 1.

Arepresents the casing or shell of the pump, including the base andbody, and said casing may be made in two or more parts, as shall befound convenient.

C represents the. diaphragm-casing at the top of the pump, containing orforming the air-chamber.

The water enters the pump through the in let-port 2, which is connectedwith the main or source of supply, and exhausts through the outlet 3 ona lower horizontal planethan inlet 2, about as shown. Between the saidinlet and outlet ports is interposed a valve D, which seats upon thelower side of the flange or rim 4 on the inside of easing A, arranged atthe bottom of inlet-port 2 and at the top of outlet-port 3. Hence, whenvalve D is seated against this rim or flange the exhaust or outlet ofwater from the pump above said valve is cut off and closed.

The valve D has a reciprocating up-anddown movement and is connectedwith two differential pistons E and F, the latter having the larger areaand adapted to a chamber made specially therefor at the bottom of thebody A. Between said pistons E and F there is a space or chamber 6,which is constantly filled with water under pressure from the mainthrough port 2 and the channel 8 in the casing A, leading from saidinlet-port to said chamber. It would follow, with the difference in thesize of the pistons E and F, as here shown, and with water-pressu reconstant in chamber 6, that the said pistons would be constantly downinstead of up, but there are other elements which enter into theoperation of the pump and which cause the said parts to travel up anddown in their chambers and to perform the functions for which they areintended, as will now be described. Thus, referring to Fig. 1, we seeall the parts as they appear at the instant when the pump is ready foraction. In this position the pistons E and F are up as far as they cango and the valve D is closed against itsseat at, thus sealing the outletfrom the water chamber or space above said valve. Now, having said valveclosed and the chamber 10 beneath piston F being filled with water underpressure from the main through channel 8, chamber 6, openings 11 in theneck connecting pistons E and F, and the auxiliary valve-tube G, havinginletholes 12, the said valve and the pistons E and F will remain up, asin Fig. 1, until the pressure beneath piston F is relieved. Before thiscan occur the valve-tube G must change position, and such change iseffected only through the operation of diaphragm H and the guide orcarrier. The diaphragm H is flexible and secured about its edge betweenthe edges of the two sections of the casing C.

Suitable valved air outlets and inlets (indicated by L) are provided forthe air-chamber 14 above diaphragm H, and the upper part of the casing Ais fastened into a chamber adapted to receive and operate the guide andcarrier K. The diaphragm H is fixed centrally to the center of guide K,so as to move therewith, and the guide K isso constructed as to afford afree passage for water to the under side of diaphragm H and a free exitwhen the exhaust occurs. Centrally in the said guide and openingdownward is a chamber 18, into which extends the upper end of auxiliaryvalve G, This valve has an adjustable nut 20 on its upper end, forming ahead which is confined in said chamber, and a stop 21 in the bottom ofchamber 18 limits the downward movement of said valve G, the nut 20engaging the said step. The inlet-port has a nozzle 22 extending inwardinto the pump, and said nozzle is inclined in the direction ofdischarge-port 3, so as to operate as an ejector when the valveD isopened and the exhaust from the pump takes place. N ow, with valve Dclosed, as in Fig. l, and the water entering the chamber or space abovethrough diagonal or inclined nozzle 22, the said chamber will quicklyfill with water and raise the diaphragm II and force the air in chamberlet out through the discharge Meantime valve D will remain closed andguide K will, of course, rise with the diaphragm. It can go abouthalf-way before it will engage the nut or head 20 by catch or stop 21and carry said valve up until the ports or holes 12 therein are broughtinto the chamber 2% in the neck between and uniting valve D and pistonE. This neck has outlet-openin gs 25 into the general discharge. By thistime the diaphragm II has done its work and is ready to descend, andthis position is reached just as the openings 12 in valve G reachchamber 24.. Then the water beneath piston Fwill be discharged and thesaid piston and the valve D will descend together, and thus thedischarge-port 3 will be thrown open and the diaphragm II and guide Kwill descend in like manner. Now it occurs that the nozzle-jet 22 comesinto action as an ejector to siphon and force the water out of the pumpand thus compel its discharge in a much shorter time than could occurwithout this help. As the parts de scend it occurs at last that thevalve G is again forced down, so that by the time the piston F reachesthe bottom the holes 12. in said valve will come down to water-chamber27 in the neck uniting pistons E and F, and then the space beneathpiston F will at once begin to fill again and soon the valve D will beclosed once more, as seen in Fig. 1. From this point the operations arerepeated, as already described.

In lieu of the guide or carrier K any equivalent construction thereofmay be used. The one here employed is of metal and the weight is noobjection, but other material might be employed.

Having thus described my invention, what I claim is I. The main casinghaving inlet and outlet ports, a valve to close the outlet-port and apair of differential pistons rigidly connected with said valve, the saidinlet-port being constantly open, substantially as set forth.

2. The construction described, consisting of the casing provided withinlet and outlet ports, a main valve to close the outlet-port. anactuating-piston connected with said valve, and an auxiliary valvecontrolling the flow of water to the said actuating-piston,substantially as set forth.

The main casing having differential pis ton-chambers and inlet andoutlet ports and an annular valve-seat between said ports, a main valveadapted to said valve-seat, and connected pistons in said dilferentialchambers to operate said main valve, substantially as set forth.

4. The casing having inlet and outlet ports and a water-space constantlyopen to the inlet-port, a main valve to close said outlet and connectedpistons to operate said valve, a pressure-controlling auxiliary valvethrough the main valve and pistons and a duct leading from theinlet-port to the space between the said pistons, substantially as setforth.

5. The casing having an outlet-port on a dif ferent transverse planefrom the inlet-port and a valve-seat between said ports, a waterchamberat one side of said valve-seat, a dia phragm-chamber and diaphragmtherein exposed to said water-chamber, a main valve for said valve-seat,operating-pistons for said main valve, and an auxiliary valve connectedwith said diaphragm and constructed and arranged to control the flow ofwater which opcrates the said main valve and pistons, all said partsarranged and operating, substantially as set forth.

6. The pump described, consisting of the casing with inlet and outletports and having a water chamber or space permanently open to theinlet-port, a valve having two controllingpistons rigid therewithclosing the outlet-port and an air-chamber and a diaphragm in said.chamber on the top of the pump, substantially as set forth.

7. The main casing and the air-chamber at the top thereof, a diaphragmin said air-chamber,a water-chamber beneath said diaphragm, a valveclosing said water-chamber at its bottom, an outlet for saidwater-chamber beneath said valve and a pair of differential pistonsconnected with said valve, substantially as set forth.

8. The main casing having inlet and outlet ports and a water-chamber, anair-chamber,

a diaphragm in said air-chan1ber and a guide connected with saiddiaphragm. and working in said water-chamber, in combination with a mainvalve for closing the outlet-port and diiferential pistons connected tosaid valve, and an auxiliary valve connected with said diaphragm, toguide and constructed to control the flow of the water which governs themain valve and its pistons, substantially as set forth.

Witness my hand to the foregoing specification this 16th day of July,ISO-l.

EDXVARD II. IVEATITEIUIEAD.

\Vitn esses:

II. T. Fisnnn,

GEORGIA Sonnnrrnn.

